Unit 1: Periodic Trends
Duration
15 Weeks
Key Concept
- Relationships
Related Concept(s)
- Change
- Form
- Function
Global Context
- Orientation in Space and Time: Discoveries
Statement of Inquiry
- The form of the periodic table is evolving due to knowledge-challenging discoveries, thus enhancing its function of showing trends in the physical and chemical properties of the elements.
Summative Assessment Criteria
- Criterion A
ATLs (Skills)
- T (CT) – Interpret data
- T (T) – Apply skills and knowledge in unfamiliar situations
- T (CT) – Use brainstorming and visual diagrams to generate new ideas and inquiries
- C (C) – Give and receive meaningful feedback
- SM (O) – Keep and use a weekly planner for assignments
Curriculum Standards
- The periodic table shows the positions of metals, non-metals, and metalloids.
- Metals tend to lose electrons and form cations, while non-metals tend to gain electrons and form anions.
- Elements in a group have the same oxidation state and similar chemical properties.
- Shielding is the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell.
- Shielding increases with the number of electron shells.
- No change in shielding occurs across a period.
- Trends in the periodic table for atomic radius, ionization energy, and electronegativity:
- Atomic radius increases down a group and decreases across a period.
- Ionization energy decreases down a group and increases across a period.
- Electronegativity decreases down a group and increases across a period.